日计算日期的名称

Question

Hi Im new to Java and Im trying to workout the Day Name for a calculated date. Im using Esko Automation Engine to run my Java

If I create a JavaScript script based on the actual date it works out using the following function:

function f () {
    var date = new Date().toString().split(' ')[0];
    return date;
}

f ();

But when I try and replace new Date() with another calculated date it fails. The calculated date displays like this: 05/02/19 10:00am and is stripped out of a xml file. This is named ScotlandDeliveryDate

function f () {
    var date = ScotlandDeliveryDate ().toString().split(' ')[0];
    return date;
}

f ();

Result:

javax.script.ScriptException: <eval>:4:25 Missing space after numeric literal
var date = 05/02/19 10:00am().toString().split(' ')[0];
^ in <eval> at line number 4 at column number 25

does anyone have any ideas please.

Answer 1

I don't know anything about "Esko". But in the example that you give above, you are trying to use one SmartName ( ScotlandDeliveryDate ) inside the definition of another SmartName. At the link below, they seem to indicate that this is done by enclosing the SmartName in brackets.

https://docs.esko.com/docs/en-us/automationengine/18/userguide/home.html#en-us/common/ae/concept/co_ae_SN_Script_Exa.html

So I think your code needs to look like this:

function f () {
   return '[ScotlandDeliveryDate]'.split(' ')[0];
}
f ();

However, from your error message, it looks like [ScotlandDeliveryDate] will return 05/02/19 10:00am ; If that's the case, then splitting that value on spaces and then grabbing the first value still won't get you the day name.

To do that, you'll need something like this:

function f () {
   var monthDayYear = '[ScotlandDeliveryDate]'.split(' ')[0];
   var dateTimeStamp = Date.parse(monthDayYear);
   var dateObject = new Date(dateTimeStamp);
   return new Intl.DateTimeFormat('en-US', {weekday:'long'}).format(dateObject);
}
f ();

Or, without the Intl object:

function f () {
   var dayNames = [
      'Sunday',
      'Monday',
      'Tuesday',
      'Wednesday',
      'Thursday',
      'Friday',
      'Saturday'
   ];
   var monthDayYear = '[ScotlandDeliveryDate]'.split(' ')[0];
   var dateTimeStamp = Date.parse(monthDayYear);
   var dateObject = new Date(dateTimeStamp);
   var dayNumber = dateObject.getDay();
   return dayNames[dayNumber];
}
f ();